The energy-momentum spectrum in local field theories with broken Lorentz-symmetry |
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| Authors: | Hans-Jürgen Borchers Detlev Buchholz |
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| Affiliation: | (1) Institut für Theoretische Physik der Universität Göttingen, D-3400 Göttingen, Federal Republic of Germany;(2) II. Institut für Theoretische Physik der Universität Hamburg, D-2000 Hamburg, Federal Republic of Germany |
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| Abstract: | Assuming locality of the observables and positivity of the energy it is shown that the joint spectrum of the energy-momentum operators has a Lorentz-invariant lower boundary in all superselection sectors. This result is of interest if the Lorentz-symmetry is (spontaneously) broken, such as in the charged sectors of quantum electrodynamics. |
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